Semi-octopost extrusion



FIG. 1 is a top, left front perspective view of semi-octopost extrusion showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side elevational view thereof. 

The ornamental design for semi-octopost extrusion, as shown and described. 